Banksy gives themself artistic license with this piece of London street art.

This secret garden has bloomed into London's most unique hub of urban creativity.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

A hands-off space for graffiti artists to hone and display their skills.

An abandoned Byzantine fortress and notorious prison.

Nicknamed Kazakhstan's Grand Canyon, this natural wonder lies east of Almaty near the Chinese border.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

An abandoned Jewish sanatorium is tucked within the woods of Poland.

A hidden art gallery in an abandoned Warsaw fort.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Its look is severe, but its location, isolated on a hill in the middle of the countryside, is particularly scenic.

A fascist-era rural village abandoned since the early 1980s.

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

Dramatic sea stacks adorn the coast of this small village on the Adriatic coast.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

This abandoned secret city is a crumbling wonderland of Soviet ruins.

The remains of a majestic house that was once stood in the crosshairs of the Irish Republican Army.

An abandoned faux-pub made famous by a Guinness commercial.

The ruins of a medieval monastery named after a type of tree.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

After being destroyed by IRA sympathizers, the ruins of this stately Irish manor have sat vacant for decades.

A moody and picturesque riverside ruin overgrown with vegetation.